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| Spectrum Access Algorithm Based on Convex Programming in Distributed Cognitive Wireless Networks |
| Zhao Min-jian; Chen Jie; Li Shi-ju |
| Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract To overcome the multi-channel hidden terminal problem in distributed cognitive wireless networks as well as improve the performance of the network, a general convex programming model is formulated. The access probability of each cognitive user can be derived from this model. A Distributed Spectrum Access Control (DSAC) algorithm is proposed based on convex optimization. The simulation results show that DSAC can converge during a few intervals, and DSAC can also increase the number of transmission links in the network so as to improve the spectrum efficiency and the network throughput.
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Received: 22 April 2008
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2009, Vol. 31 
